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05/04/1999 10:44 2095385852 GEOLOGICAL TECHNICS PAGE 02/02 <br /> CJeologicafTecfmics lnc. <br /> 2741 Afv<r Road <br /> Madura,caffarnia 95351 <br /> 209-538.64Z4/3axZ09-538-5052 <br /> Memo <br /> To: Carol Oz <br /> From: Ray Kablanow <br /> Project Name: Fonzia(501 Acacia) <br /> Project#: 774.2 <br /> Subject: Phone Conversation <br /> cc: Notes File <br /> Date: April 30, 1999 <br /> I spoke with Gail Wiggett of the CRWQCB-CVR regarding the work plan for additional soil and <br /> groundwater investigation at 510 Acacia, Tracy. Gail had these initial comments and <br /> suggestions: <br /> 1. The background borehole does not need to be tested for semi-volatile organic compound <br /> unless we are attempting to show that these contaminants are coming from off site. Just test <br /> these samples for the five metals by method 6010. <br /> 2. The area downgradient of GP-9 (northeast of the warehouse) should also be investigated. <br /> The reasoning for this is that motor oil was found at approximately I mg/L (ppm) in GP-9 & <br /> 12 and 1.7 mg/L in GP-13. These test points are downgradient of the former storage area, <br /> which has motor oil concentrations ranging from 3.7 to 15.7 mg/L. The motor oil in GP-9 <br /> may be a separate source of motor oil s illed along the railroad spur or it may be a <br /> downgradient extension of the oil spilled at t e former storage area. <br />